Designation B1004 − 16 Standard Practice for Contact Performance Classification of Electrical Connection Systems1 This standard is issued under the fixed designation B1004; the number immediately foll[.]
Trang 1Designation: B1004−16
Standard Practice for
Contact Performance Classification of Electrical Connection
This standard is issued under the fixed designation B1004; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision A number in parentheses indicates the year of last reapproval A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1 Scope
1.1 This practice provides a method of specifying
perfor-mance requirements for (or reporting test results of) electrical
contact and connection systems Both conductor and connector
system performance may be specified by this practice,
sepa-rately or in combination
1.2 This practice may be used for separable or permanent
contacts employing metallic conducting components
1.3 This practice is applicable to both signal and power
applications
1.4 This practice is intended to be used for specifying
performance of connectors and connection systems that are
marketed for general public and trade application, as for
instance for use in building wiring, electronics, and vehicles
1.5 This practice is not intended to be used to specifying the
applications, such as military, industrial, aircraft, power
distribution, and medical apparatus
1.6 This practice does not specify the sample preparation or
test sequences required for determining contact performance It
is the responsibility of the user of this practice to determine the
applied test sequence(s) appropriate for the application
1.7 This standard does not purport to address all of the
safety concerns, if any, associated with its use It is the
responsibility of the user of this standard to become familiar
with all hazards including those identified in the appropriate
Safety Data Sheet (SDS) for this product/material as provide by
the manufacturer, to establish appropriate safety and health
practices and determine the applicability of regulatory
limita-tions prior to use.
2 Referenced Documents
2.1 ASTM Standards:2
B539Test Methods for Measuring Resistance of Electrical Connections (Static Contacts)
B542Terminology Relating to Electrical Contacts and Their Use
B812Test Method for Resistance to Environmental Degra-dation of Electrical Pressure Connections Involving Alu-minum and Intended for Residential Applications
3 Terminology
3.1 Terms used in this practice are defined in Terminology
B542 except as noted in3.2
3.2 Definitions of Terms Specific to This Standard: 3.2.1 conductor, n—electrically conductive member
carry-ing current to a contact interface Examples are wire and cable, busbar, and conductive paths on an etched printed circuit board
3.2.2 connection performance, n—the condition and
behav-ior of the contact interface(s) within the connection as indi-cated by electrical resistance and resistance change with time under the applied conditions
3.2.3 connection system, n—the completed electrical contact
interface and all associated parts, assembled as prescribed by the manufacturer(s) for the intended service
3.2.4 intended conditions of use, n—any combination of
applied electrical, environmental, and other conditions associ-ated with the intended and rassoci-ated application
3.2.5 nonincreasing, adj—as applied to connection
resis-tance values, mathematically, a series of numbers that are bounded above
1 This practice is under the jurisdiction of ASTM Committee B02 on Nonferrous
Metals and Alloys and is the direct responsibility of Subcommittee B02.11 on
Electrical Contact Test Methods.
Current edition approved Oct 1, 2016 Published October 2016 DOI: 10.1520/
B1004-16.
2 For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at service@astm.org For Annual Book of ASTM
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website.
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Trang 24 Performance Classification Practice
4.1 The performance specification (or reporting) statement
consists of an alphabetic classification, a brief statement of the
intended conditions of use, and, for Class B only, the expected
minimum years of life in the intended application Class A and
Class B statements shall include reference to a published
standard or method by which the performance classification
has been determined
4.1.1 Class A—A connection system for which the
resis-tance is predicted to be nonincreasing for an unlimited time
under the intended conditions of use, when installed in
accor-dance with the manufacturer’s instructions The classification,
the intended use, and a reference to the published standard(s)
or method(s) used to determine the classification are stated For
critical applications (where life safety is a concern, for
in-stance) users of this classification are advised to state the
connection resistance boundary that is considered to be
accept-able for the particular application
4.1.1.1 Example of use: “Class A, for residential branch
circuit copper wiring, dry locations, 0.05 ohm, Standard
XXXX.”
4.1.2 Class B-xx—A connection system for which the
resis-tance is predicted to be nonincreasing for a defined minimum
number (“xx”) of years under the intended conditions of use,
when installed in accordance with the manufacturer’s
instruc-tions The classification, the predicted life in years, the
in-tended use, and a reference to the published standard(s) or
method(s) used to determine the classification are stated For
critical applications (where life safety is a concern, for
in-stance) users of this classification are advised to state the
connection resistance boundary that is considered to be
accept-able for the particular application
4.1.2.1 Example of use: “Class B-25, for low-voltage
un-derground direct burial cable splices, Method YYYY.”
4.1.3 Class C—A connection system for which no
predic-tion of performance is made for the intended condipredic-tions of use 4.1.3.1 Example of use: “Class C, for boat trailer lighting.” 4.2 A given connection system may have different perfor-mance classifications for different applications
5 Significance and Use
5.1 This practice is based on the use of electrical resistance
as an indicator of contact performance This is the fundamental physical attribute that reflects the condition of the electrical contact interface(s) within a connection For practical current-carrying electrical connections, resistance may be calculated from potential drop measurements, as described, for example,
in Test MethodB539andB812 5.2 This practice accommodates the use of multiple test methods, as may be required to predict performance in a given application
5.3 This practice applies only to the performance of the current-carrying contact interface(s) It does not characterize the performance of insulating materials or other components of
a complete connection system
5.4 Specifiers may use the performance classification as a requirement for a given application
5.5 Manufacturers may use the performance classification to reflect the relative quality of their products
6 Precision and Bias
6.1 Precision and bias are those of the test method(s) applied
7 Keywords
7.1 conductor; connection resistance; connector; contact; electrical connection system; electrical contact; metallic; per-formance classification;
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B1004 − 16
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